Improvement in combined pipe-cutters and screw-threaders



2 Sheets-Sheet 1.

G. SANFORD. COMBINED PIPE-GUTTER AND SCREW-THREADER. No. 180,649.

Patented Aug.1,1876.

Wzesses m @MM NV PEHS, PHOTO-UTHUGRAPHER, WQSHMGTON, D4 C4 V l 2 Sheets-Sheet 2.

G. SANFORD.

COMBINED PIPE-CUTTER AND SCREW`TI'IREADEIR.` No. 180,649. Patented Aug.1,1876.

if/lame.;

NPEIERS. PHOTO-LITHeGRAPhER. WASHINGTON, D4 c.

PATENT @Erica l VGELSTON SANFORD, OFv STROUDSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF HIS RIGHT TO JOHN W. QUINCY, OF NEW YORK, N. Y.

lIMPROVEMENT IN VCOMBINED PIPE-CUTTERS AND SCREW-THREADRS.

l .Specilieation forming part of Letters Patent No. 180,649, datd August l, 1876; application filed June 23, 1876.

This invention relates to hand tools or de-v vices for transversely severing or dividing pipes and bolts, and forV cutting screw-threads thereon, in which the severing-cutters or the threading-,die carried by the tool arev rotated by a ratchet through the instrumentality of a hand-lever having an attached pawl.

The invention consists in certain novel constructions and combinationsof parts, includ-` ing an automatic feeding device of the severing-cutter, deriving its motion by rotation of 'the ratchet; also, including a leading nut or screw-sleeve for obtaining bite or hold ot' the die or dies when cutting a screw-thread on the Apipe or bolt, whereby not only simplicity is combined Witheiciency, but time is largely economized in the performance of the work. As the invention is mainly designed for cntting and threading pipes, it will'here be described accordingly.

Figure l represents a face or side view of my improv ed tool as adapted to work a severing-cntter, and is applied to transversely cutting or dividing a piece of pipe.

' right anglesto the former gure. Fig. 3 is a face or side view of the tool as adapted and applied to cutting-a screw-thread on-a pipe, and Fig. 4 a central section of the same in a plane at right angles to Fig. 3.

In Figs. I and 2 of the drawing, Ais a' Fig. 2 is a central section of the same in a plane atas, for instance, by makingit capable of receiving over its outer end a tubular extension of the handle when it is necessary to lengthen the latter. Said lcver,which is operated by vibratingit backward and forward to rotate the ratchet A, has its' inner end constructed to form a ring, b, which encircles, and has its constructed to rest on and withinstuds e c c c. on the face or outer side ot' the ratchet-and so that when in place, and in lock with one or more of said studs to prevent it being drawn out radially in relation to the ratchet, said cutter-stock is held i'acially to its seat on the studs by screw-bolts f f. By slackening or removing these screws said cutter-stock may be removed from the ratchet when required.- The pipe E to be cutis lirmly held in -a vise or oth-` erwise, and the cutting-toolis slipped over it till the cutter B is adjusted to its proper position in the length of the pipe. 'lhe pipe being a fixture, the ratchet and cutter portion of the tool is rotated on it, preferably by means of a bush or sleeve as a bearing-surface, arranged within the eye of the ratchet. Thus Gr, is -a bush arranged to jt within the nave c of the ratchet, and secured, by the set-screw s, to r0- tate along with the ratchet. This bush has another bush or sleeve, H, iitted within'it, and the interior diameter of which corresponds with the outer diameter ofthe pipe. 'This lastnamed sleeve H'has a screw-thread on its exterior, tlttin g a correspondingthread onthe interior of the bush G, and it is furthermore provided with a locking-screw, I, which, however, is loosened, or may be removed, when simply cutting pipe 5 and the object of which, as well as ofthe duplicate bushes in the hollow eye or nave of the ratchet, (the inner one, H, of which l denominate a leading nut or sleeve,) Will be explained when describing the tool as adapted to threading a piece of pipe. By slackening the screw I, however, the -samc sleeve, H,

Q l l50,641)

AL, which, as theratchet comes round, strikes the vibrating or operating lever D, and turns the screw to give the cutter a fresh feed.

x This handle or'wheel L has its irregularities formed by projections g, so shaped and arranged as to actuate thescrew K as they s uccessively strike and ride over the lever D, or

4 a projection thereon, and t0 successively assume a like operating position during each rotation of the ratchet. Said wheel L may also be used to adjust the cutter `by hand. In this way, or by these means, it is only necessary to continue vibrating the lever D to effect both the rotation and feed of the cutter around and through the pipe; Any number of cutters B may be used, with attached means for feeding or adjusting them, as described.

In Figs. 3 and 4 of'the drawing, which represent the tool as applied to cutting a screwthread on the end of the pipe E, one or more screw-cutting dies, M, is substituted for the cutter B and its stock F, said die (supposing there to be only one) being seated on or against the face of the ratchet within the studs e, and other studs, e", as Walls to the die, and, when thus placed, being held in position, or kept from falling out, by means of a plate, N, secured to the outer end of the studs by the bolts f f.

When the tool is thus applied the screw I is turned to lock or hold the leadingnut or sleeve H fast ou the pipe E, so that as the ratchet A is rotated, by working the lever D with its attached pawl C backward and forward, as before, the die M is led to take a fair bite or hold,

on the pipe by the screwing of the bush G onto the sleeve' H, the bush G rotating with lthe ratchet. After the die M, however, has gotA a fair bite or hold on the end of the pipe, the

screw I 'may be loosened, and the sleeve H beallowed to rotate, together with the bush G and ratchet A; or the sleeve H may be kept permanently fast to the pipe by the screw I, provided the length of thread to be cut on the pipe does not exceed the length of the threaded portion of the sleeve H. The bushes' or sleeves G and FI may be substituted by others of different diameters or pitch as regards theirscrew-threads, to suit different diameters of pipe, and different screw-threads thereon.

I claim- 1. The combination of thc cutter-feeding screw K and its operatingwheel L with the rotating ratchet A and the vibratinglever D, with its attached pawl G, by which the ratch- 4et and cutter are rotated and the cutter advanced, essentially as described.

2. rIhe leading nut or screw-sleeve H, in combination with the rotating ratchet A 'and screw' die or dies M, carried by the latter, essentially as specified.

GELSTON SANFORD;

Witnesses:

BENJAMIN W. HOFFMAN, FRED. HAYNES. 

